Road machine



J. B. JARMIN June 30, 1931.

ROAD IAGHINE A Filed April 20, 1928 v 3 Sheets-Sheet l attoz mug J. B. JARMIN ROAD MACHINE- June 30, 1931.

Filed April 20, 1928 3 Sheets-Shea t 2 glwuemtoz M01 my,

June 30, 1931.

J. B. JARMIN ROAD MACHINE Filed April 20, 1928 3 Sheets-Sheet 3 Patented a... 30, 1931 PATENT OFFICE JAMES B. JARMIN, 0F DALLAS, TEXAS ROAD MACHINE Application filed April 20,

This invention relates to new and useful improvements in road machines.

One object of the invention is to suspend parallel scraping blades from a wheel supported frame in such a manner that said blades may be readily adjusted to any desired height, inclination or pitch, whereby the scraping of a. road surface may be more efficiently performed and the work more minutely controlled than heretofore.

A particular object of the invention is to mount the dual blades on a sub-frame which is suspended from a hanger frame and the latter so hung as to be substantially universally adjustable, whereby the blades may be tilted transversely of the machine to compenscate the crown of the road, or adjusted vertically so as to out to a. fraction, or their pitch varied so as to dig more effectually into the surface to be scraped.

A further object of the invention is to provide a motor driven road machine for leveling, grading and resurfacing macadam, gravel, dirt and similar roads, in an expeditious, simple and minutely controlled manner, whereby ridges and bumps are cut off and the earth pulverized to fill in holes, sumps and corrugations, all of which results in the production of a smooth and compact surface.

An important object of the invention is to provide a motor driven road machine equipped with a main frame having a hanger frame hung therefrom and carrying a pair of spaced blades and provided with means for tilting and adjusting the hanger frame including positive and sensitive controls, whereby the driver may accurately adjust the cutting edges of the blades with relation to the road surface and whereby he may vary the depth of the cut to a fraction of an inch, and also whereby the out of one blade may be made more or less than the out of the other blade.

A still further object of the invention is to provide a frame hanger gearing carrying the blades and arranged so that the strains and shocks incident to the impact of the blades, are dissipated and not transmitted to the 1928. Serial No. 271,609.

hand wheels or other adjusting means grasped by the driver.

.A construction designed to carry out the invention will be hereinafter described, togcther with other features of the invention.

The invention will be more readily understood from a reading of the following specification and by reference to the accompanying drawings, in which an example of the invention is shown and wherein:

Fig. 1 is a perspective view of a road machine constructed in accordance with the invention,

Fig. 2 is an enlarged partial longitudinal sectional view,

Fig. 3 is a partial plan view of the hanger and sub-frames,

Fig. 4 is a longitudinal sectional view taken on the line 4.4= of Fig. 3,

Fig. 5 is a horizontal cross-sectional view taken on the line 55 of Fig. 2,

Fig. 6 is a horizontal cross-sectional view taken on the line 66 of Fig. 3,

Fig. 7 is an enlarged vertical sectional view taken on the line 7-7 of Fig. 4,

Fig. 8 is a detail of the sub-frame,

Fig. 9 is a detail of one of the blade braces,

Fig. 10 is a detail of the latch operating head,

Fig. 11 is an enlarged horizontal crosssectional view taken on the line 1111 of Fig. 2,

Fig. 12 is an enlarged vertical sectional View taken on the line 1212 of Fig. 3,

Fig. 13 is. an enlarged cross sectional view showing mounting of one blade standard on the frame, and

Fig. 14 is an enlarged detail section of the segmental adjusting gearing.

In the drawings the numeral 10 designates an elongated arched frame of a motor vehicle and supported at its rear end upon driving wheels 11,while at its forward end it is carried upon steering or front wheels 12. Suspended from the arched portion of the frame is a hanger frame 13, while a sub-frame 14 depends from the hanger frame. The subframe carries a forward scraping blade 15 and a rear scraping blade 16 spaced a substantial distance therefrom. These parts tudinal axis ofthe bolt is coincident with the longitudinal central axis of the hanger frame, whereby the latter may be tilted transversely of the machine.

The clevis is slidable vertically on the post 20 of the truck of the front wheels. The post is supported on the front axle 21 and extends through a cross plate 22 on the main frame. An angle bracket 23 is fastened on the post and supports a pinion 24 and a depending screw 25 extending through the clevis. A nut 26 on the screw is confined in a keeper 27 on top of the clevis, so that upon rotation of the screw the nut is caused to travel on the screw, thus raising or lowering the clevis on the post. This operation effects a vertical adjustment of the front end of the hanger frame.

The steering of the front wheels may be carried out in any suitable manner and controlled from the rear of the machine as is common in this art. For rotating the screw, a stub shaft 28 is journaled in the bracket 23 and has fastened thereon a pinion 29 meshing with the pinion 24. A crank shaft 30 supported in a bracket 31 in the main frame is connected by a universal joint 33 with an inclined rod 32 having connection at its lower end with the shaft 28, by means of a universal joint 34. By revolving the crank shaft the front end of the hanger frame 13 may be vertically adjusted.

The hanger frame 13 is rectangular at its rear end (Fig. 3) and is carried by links or hanger bars 35- swiveled at their lower end (Figs. 2, 4 and 5) to said frame. The links are swiveled at their upper ends to the forward ends of hanger arms 36 extending forwardly from the hubs 37 of segmental gears 38, the parts 36, 37 and 38, preferably being integral.

The hubs are journaled on a transverse shaft 39 fastened at its ends in brackets 4.0 secured to and rising from the main frame. The lower ends of the brackets 40 are connected by a transverse saddle bar 44 extending across the frame from one bracket to the other and preferably,butnotnecessarily,made integral with said brackets. The hubs are confined by collars 41 fastened on the shaft. Each link and its supporting means is separately adjust-able, whereby one side of the frame may be raised or lowered independently of the other side, or whereby both sides may be raised or lowered in unison.

By such adjustments, the frame 13 may be tilted transversely, adjusted vertically and maintained in a horizontal plane, or inclined either forwardly or rearwardly.

For adjusting the segmental gears 38 worm shafts 42 are mounted on each side of the main frame and have their forward ends supported in brackets 43 (Fig. 5) mounted on the saddle bar 44 hung across the main frame. Each shaft has a worm screw 45 fastened thereon and meshing with the bottom of the correlated gear 38. The rear end of each shaft is connected by a suitable transmission gearing 46 with a large hand wheel 47 supported by a standard 48.

By revolving either hand wheel, the shaft 42 thereof is rotated, whereby the segment is rocked and the corresponding end of the frame 13 is adjusted. For equalizing the raising and lowering of the hanger frame, heavy coiled springs 49 have their front ends attached to an angle cross bar 50 mounted on the main frame (Figs. 1 and 2), while their rear ends are pivoted to eyes 51 mounted on the inner side of each center spoke of one of the segmental gears 38. When a gear is rocked rearwardly to lower the arm 36. link 35 and the side of the hanger frame suspended from said link, the attached spring 49 will be tension-ed. The function of the springs is obvious.

The subframe 14 is centrally hung in the vertical plane of the longitudinal axis of the hanger frame and the main frame by stirrups 52 and 53 (Figs. 2, 5 and 6). This frame 14 is flexible, in that it is pivotally united at its four corners whereby it may be shifted in a horizontal plane as is shown in dotted lines in Fig. 3. The front corners are pivoted as shown in Fig. 8, while the rear corners are pivoted as shown in Fig. 13. I

The purpose of shifting the sub-frame is to change the transverse angle of the blades 15 and 16. For shifting said frame a channel ring 54 is rotatably supported in the rear portion of the hanger frame by means of studs 55. Within the ring is fastened on opposite sides a pair of castings 58 supporting a flat bolster 56. 1 The ring is stayed by diagonal braces 57.

The bolster 56 extends beyond the ring.

and is pivotally connected with the sub-frame 14 by studs 59 carried by brackets 60 secured to said frame. The braces 57 are secured to the inner wall of the ring by angles 61 and igcline downwardly to the castings 58 (Fig. 3

When the ring is rotated one side of the sub-frame 14 will be moved forwardly while the other side will be moved rearwardly, it being noted that the three pivot points along each side always remain in alinement and parallel to the longitudinal axis of the hanger frame. The side bars of the sub-frame are supported near their forward ends in the stirrups 62 connected by a bridle bar 63 extending across said frame (Figs. 1, 2, 3 and 4). The bar 63 is suspended from the frame 13 by hangers 64. This structure stabilizes the front end of the frame 14.

For locking the ring in position a spring plunger 65 penetrates the rear of the hanger frame 13 (Figs. 3 and 4) and engages in spaced holes 66 in said ring. The plunger extends through a yoke 67 and has a head 68 on its rear or outer end.

A transverse actuating bar 69 is slidably supported on the plunger and carries a wedge 70 (Figs. 3 and 10) so that when said bar is 'pulled from the slde of the frame 13, said wedge is slid under the head 68, whereby the plunger 65 is displaced rearwardly and withdrawn from the ring hole 66, in which it is seated. The outer end of the bar 69 is pivoted on a short crank shaft 71 (Figs. 1 and 3), which is journaled on the side of the hanger frame. For operating the plunger a crank rod 72 having a suitable handle is connected to the shaft 71 by a universal joint 73 and is supported in a standard 74, so as to be easily reached by the driver.

It is important that the blades 15 and 16 be so supported as to maintain their parallelism and also be capable of tilting. Hangers 75 are bolted to the side beams of the hanger frame 14. These hangers have their lower ends curved forwardly and each pivoted in a clevis 76 (Fig. 7) .by a pintle 77. Each clevis has a swivel head 78 at its lower end mounted in a keeper 79 bolted to angular back bar 80 secured longitudinally to the correlated scraper blade.

Each blade is curved transversely of its length, but is provided with a straight lower cutting edge. The blades" extend outwardly on each side of the hanger frame. The hangers of the rear blade 16 aresecured to the rear ends of the side beams of the hanger frame 14 (Figs. 2 and 4) while the hangers of the front blade 15 are secured to said beams just in front of the brackets 60. The blades are thus spaced apart a substantial distance.

The ad ustment of the blades is, an important feature of the machine. By turning the crank shaft 30 to rotate the screw 25 the clevis 18 is raised or lowered to vertically adjust the front end of the hanger frame. This adjustment will change the inclination of the hanger frame longitudinally of the machine.

Also if both hand wheels 47 are rotated in.

unison, the rear end of the hanger frame will be raised or lowered by the'links 35.

When it is desired to cut deeper with the front blade 15 than with the rear blade 16,

rotating the hand wheels 47 to raise one side and lower the other side of the hanger frame.

When the hanger frame 14 is rectangular or at right angles to the longitudinal axes of the main frame, the blades will be straight across the machine or at right angles to the longitudinal axis of the main frame. When it is desired to move the scraped material to one side, the sub-frame 14 is shifted by rotating the ring 54, as indicated in dotted lines in Fig. 3, whereby the blades, because of the clevis 76, are shifted to a diagonal position.

It is pointed out that in all adjustments the parallelism of the blades is maintained and this is important in the functioning of the machine. For different kinds of work it is desirable to change the pitch of the blades. Each hanger 75 (Figs. 2 and 4) is provided with an ear 81 near its upper end portion and the upper portions of the blades have lugs 82 secured to their rear sides. Strut bars 83 are pivoted respectively at their ends to the lugs and ears and are arranged in overlapping pairs.

Each bar has a plurality of bolt holes 84 and bolts 85 passing through registering holes fasten the bars together. WV-hen it is desired to change the pitch of a blade, the bolts 85 are removed, the blade swung on its pintles 77 and the bolts replaced in other bolt holes 84. The strut bars have the very necessary function of bracing the upper portions of the blades to offset the rocking strain due to the scraping resistance.

Various changes in the size and shape of the different parts, as well as modifications and alterations, may be made within the scope of the appended claims.

What I claim, is:

1. In a road machine, the combination of a wheel supported main frame, a hanger frame, means for supporting the hanger frame at three points from the main frame, one of said points providing for swinging the hanger frame on its longitudinal axis, two of said points having means for suspending the hanger frame at each side and capa le of independent adjustment, whereby said hanger frame may be tilted with refer- -.ence to thehorizontal, or vertically adjusted, a sub-frame having one of its ends pivoted to the hanger and its sides pivoted to said ends, and a pair of blades suspended from the sub-frame.

2. In a motor driven road machine, the combination of a wheel supported main frame, a hanger frame suspended from the main frame and adjustable thereon, a sub-- frame carried by the hanger frame and comprising pivoted members for shifting in a horizontal plane with its members in arallelism, and a pair of parallel scraping liilades pivotally mounted on the sub-frame, and means for maintaining said blades in their parallel relation when the sub-frame is shifted and also for maintaining them uprightly.

3; In a motor driven road machine, the combination of a Wheel supported main frame, a hanger frame hung from the main frame, a sub-frame suspended from the hanger frame. parallel blades mounted transversely of the sub-frame and pivoted thereto, said blades being spaced apart longitudinally of the machine, means for adjusting the vertical inclination of said blades upon the sub-frame,'and means for adjusting the sub-frame upon the hanger frame and blades in a horizontal plane without disturbing the parallelism of said blades.

4. In a motor driven road machine, the combination of a wheel supported main frame, a hanger frame hung from the main frame, a sub-frame suspended from the hanger frame, parallel blades mounted transversely of the sub-frame and pivoted" thereto, said blades being spaced apart lonitudinally of the machine, means for adustin the vertical inclination of said blades upon t e sub-frame, means for adjusting the sub-frame upon the hanger frame and blades in a horizontal plane without disturbing the parallelism of said blades,'.and means for shifting the sub-frame to vary the transverse angularity of said blades without disturbing their parallelism.

5. In a motor driven road machine, the combination of a wheel supported main frame, a hanger frame suspended from the main frame, an adjusting ring rotatably mounted in the hanger frame, a jointed subframe suspended from the hanger frame and pivotally connected with the ring so as to be shifted upon rotation of said ring, a pair of parallel blades carried by the sub-frame, a

'. locking device carried by the hanger frame and engaging the ring, a withdrawing element for the locking device mounted on the hanger frame and including a wedge for retracting the locking device when said element is operated, and an operating rod on the main frame and having universal connection with said withdrawing element.

6. In a road machine, the combination of a wheel supported main frame, a hanger frame mounted upon the main frame at its forward end for lateral tilting and at its rear end provided with independent means at each end to effect such tilting, means for bodily adjusting the. forward end of the hanger frame in a vertical plane, a sub-frame having its sides and ends movable in parallelism, means for suspending the sub-frame from the hanger frame for rotative adjustment thereon, and spaced scraper blades suspended from the sub-frame.

7. In a road machine, the combination of a main frame, a hanger frame suspended therefrom, a ring rotatably mounted in the hanger frame, a jointed sub-frame having side bars pivotally connected with the ring operating means on the main frame having 7 connection with said withdrawing element.

8. Ina road machine, a. wheel supported main frame, a hanger frame pivotally supported at its front end on the main frame, means for adjustably suspending the rear of the hanger frame from the main frame, a sub-frame carried by the hanger frame and having pivotal connections between its sides and ends to permit shifting in a horizontal plane with its sides in parallelism, a rotary adjustable support for the sub-frame upon the hanger frame, and a. blade mounted on the sub-frame.

9. In a road machine, a wheel suspended arched main frame, brackets mounted on said frame at its upper portion, a transverse rock shaft above said frame having its extreme ends sup-ported in said brackets, segmental gears journaled on said shaft, arms attached to said gears, links suspended from said arms,

a blade carrying frame suspended by said links, worm shafts extending from said gears to the rear of the frame, worms onsaid worm shafts meshing under said gears, a saddle bar extending transversely of the frame under the gears, and brackets mounted on said saddle bar and in which the worms are journaled.

10. A road machine as set forth in claim 9 with counterbalancing coiled springs, each spring having its rear end attached directly to-one of the gears near its rim and its forward end attached to the frame.-

11. In a road machine, a wheel suspended arched main frame, a transverse bar secured to the under side of said frame, upright brackets extending from the ends of said bar outwardly on the outside of said frame, a transverse rock shaft above said frame having its extreme ends supported in the upper ends of said brackets, segmental gears having integral hubs journaled on said shaft, brackets mounted on the transverse bar, worms journaled in said brackets'and meshing with said gears, operating shafts extending rearwardly of the frame from said worms, arms extending forwardly from the 

